pk-debuginfo-install: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On CentOS possible default full paths are:

/usr/bin/pk-debuginfo-install - from package: PackageKit-debug-install

You may install the required package with command yum install {package}

Error in other languages:
pk-debuginfo-install: bevel nie gevind nie
pk-debuginfo-install: comandă negăsită
pk-debuginfo-install: comando não encontrado
pk-debuginfo-install: commande introuvable
pk-debuginfo-install: command not found
pk-debuginfo-install: käsku ei ole
pk-debuginfo-install: không tìm thấy lệnh
pk-debuginfo-install: komanda nerasta
pk-debuginfo-install: Kommando nicht gefunden.
pk-debuginfo-install: kommandot finns inte
pk-debuginfo-install: komut yok
pk-debuginfo-install: nie znaleziono polecenia
pk-debuginfo-install: níor aimsíodh an t-ordú
pk-debuginfo-install: no se encontró la orden
pk-debuginfo-install: no s'ha trobat l'ordre
pk-debuginfo-install: opdracht niet gevonden
pk-debuginfo-install: parancs nem található
pk-debuginfo-install: perintah tidak ditemukan
pk-debuginfo-install: príkaz nenájdený
pk-debuginfo-install: příkaz nenalezen
pk-debuginfo-install: команда не найдена
pk-debuginfo-install: командата не е открита
pk-debuginfo-install: 命令找不到
pk-debuginfo-install: コマンドが見つかりません